Control for cutting apparatus



C. F. SHEELEY CONTROL FOR CUTTING APPARATUS 2 sheets-shew 1 IN VEN TOR.

CHA/M55 E' Jfgasr A TTORNEYS April 12, 1949.

Filed Aug. 2'?, 1946 man.. l 003 NW 2 nl April l2, 1949. c. F. sHEELEYCONTROL FOR CUTTING APPARATUS 2 Sheets-Sheet 2 Filed Aug. 2'7, 1946INVENTOR.

ffm/suf; F .J7/525V Mund/9 my A TTUP/VEYS Patented pr. 12, 1949 UNITEDSTATES `ATENT oFFlcE Charles F. Sheley,

,East Orange, N. J., assigner of one-half ,to utolpert E. Joy,

Freeport, N. Y.

Application August 27, 1946, Serial No. 693,300

,11 Claims. 1 This .invention relates to `cutting machines andparticularly to a control means for governing movement ol a toolreiative to a piece of work. to be operated upon by said tool.

ln previous rotating disc tool machines, it has been diicult to controlin a simple manner the speed oi advance or the tool toward and into thework after the cutting action is started. Such a speed control should beadjustable with ease to accommodate various sizes of work.

One of the objects of the invention is to control speed of movement ofthe tool toward the Work so that 'the approach can be at a relativelyrapid rate and the cutting movement at a much slower rate.

Another object is to matically hold the tool in an inoperative positionafter having been manually lifted away from the work following a cuttingoperation.

Still another object of the invention is to pro vide means for adjustingwith ease the point where the control mechanism changes the speed of thetool movement and where the tool is stopped non completion of a cut sothat various size pieces Lg? equipped with the invention.

rShes-e and other features, objects, and advanof the invention willbecome apparent from lthe following description and drawings.

In the drawings:

Fig. l is a broken vertical view partially in sec- 2 is a plan View ofthe apparatus of Fig. 1. Fig. 3 is an enlarged sectional view of oneform of hydraulic cylinder.

Fig. 4 is a View along the line t-ll of Fig. l.

Fig. 5 is a sectional view along the line 5--5of 2 or one type ofbearing that may be used for a pivot arm.

rhe invention is particularly useful on a in achine having a rotary typetool such as a saw or an abrasive disc.

In accordance with the present invention, a hydraulic control valve isprovided which can be released so that the tool support \lvill advancewith n work. The arrangement is such that the hydraulic flow rate duringmovement toward the work is changed so that about 1. time the toolcontacts the work, the tool support movement is retarded. the cuttingoperation, the tool support can be raised upwardly and will lock itselfautomatically in a retracted or upper position.

ln a preferred embodiment, frame il) has brackets l i' `mounted thereon,

work may be accommodated in a machine' Upon completion of said bracketscarrying provide a means to autorocking action of adjusting screw beused for vholding :the -tool support l2, a pre ferred form being shownin Fig. 5.

In some previous devices, the pivoted-tool support li2 .has beenrcounterbalanced in some manner and has been operable so as to bring thetool manually into engagement with the work. Upon completion o `thecutting operation in such devices,\thetool has been lifted away from thework so that a new piece could be inserted.

Hydraulic cylindertl is supported on adjustable bell cranks 272, saidbell cranks being pivotally mounted on shaft 23 and supportedby'brackets 2t (Figs. A1 and 4) carriedby frame le. A nut 25 isoscillatably mounted between the short ends of the bell cranks and saidnut is 4elngaged by an adjusting screw said adjusting screw beingturnable'by manually operated crank handle 21,.

Spacers'r and 29 are pinned to screw 25 and serve -to hcldtheadjustingscrew 26 longitudinally relative to the front Wall Sil of the frame 1 6of the machine. The spacers have spherical suriaces gil and 3-22,respectively, so as to allow for the slight 2@ as bell @rank lever isoscillated about pivot 23. The cylinder 2l is pivotally mounted by boltsVl to the long ends of bell cranksw. Piston 33 is slidable `in hydrauliccylinder 2l, said piston being provided with rings .1Min a conventionalvmanner or other type 0f racking means- The upper end of piston 133Carries ,a Connecting rod 35, seid .rod .beine pivctally mounted at 35t0 bracket il, said bracket in turnbeine fastened by bolts tu rivetedtool support :l2- vClosuremember 59 is screw threadedi-y engagedat lll..vith the upperend oivlnder 2l, there being a suitable packing Mprovidglbef tweenthe ends of closureit and the .bottom L112 of vtheenlarged bore at the upper end of cylinder I2l. Adjusting vnuts .43 are,providedon vthe screw threaded portionit, of .theconnecting rod -35tolimit-the motion of the piston andftool support inwardly relative-to-thecylinden flfheiiuid outlets from the nuid end :i5 of cylinder il!are controlledbya -rst uuid-outlet 115 and a ylower or second outletdv'lfthe spacing ofthe outletslbeing correlated to each other and thecylinder according to the particular machine involved.

Pipes 48 and 49 are connected through valves 56 and 5I to a pipe 52.Pipe 52 is connected by means of liexible lead 53 to pipe 54 mounted onsaid pipe 54 leading to control valve 55, said valve being controlled bymeans of a hand control lever 56. The hand control lever 56 is pivotallymounted at 51 on tool support I2, spring 58 normally holding said handcontrol lever Outlet flexible connection 6I to reservoir 62, saidreservoir being above the level oi cylinder 2 I. Pipe 53 is connected tothe inlet end 64 of hydraulic cylinder 2 I, there being cylinder butserving to prevent uid from passing out through pipe 63 and returning tothe reservoir 62.

When the pivoted arm I2 is in its upper or inoperable position, theweight of the arm will be transmitted through connecting rod 35 topiston 33. Inasmuch as valve 55 is closed, fluid cannot escape fromcylinder outlets 46 and 41, and the arm will remain The ball check valve65 prevents fluid from passing out of the cylinder. A piece of work to.be operated upon is indicated diagrammatically at 61 and held in somesuitable manner on work holder 66. Hand control lever 56 is presseddownwardly which will open valve 55 allowing iiuid to bow through pipe52 from uid outlets 46 and 41. At this time, the piston is in an upperpart of the cylinder as indicated by the dot-dash line 68 (Fig. 3) sothat both inlets 46 and 41 are open. The position of inlet 46 is port,and therefore the erned by the position of adjusting nuts 43, said nutsupon engagement with guide 39 serving to stop the downward movement ofthe piston above the second or lower iluid outlet 41. When it is desiredto raise the piston, handle 56 is grasped and the tool support and toollifted upwardly. Fluid will iiow from reservoir 62 through pipe 63 andcheck valve 65 into the cylinder 2I When the handle 56 is released, ballcheck valve 65 will close so that the pivoted tool support will be heldin its upper or inoperable position inasmuch as liquid will not be ableto escape from cylinder 2 I The broken lines at I4 show the wheel afterit has completed a cut through the work shown diagrammatically at 61,there being suitable clearance means provided in the work holder 66. Thedashed lines at I4 show the travel of the wheel that might be utilizedwith a different kind of work holder or larger work. The broken lines at22 indicate a lowered position of the cylinder to lower the point wherethe piston rst covers the upper iiuid opening 46 to change the speed ofthe tool advance.

One form of pivoted support that might be used for the tool support I2is shown in Fig. 5, wherein the pivoted arm I2 has conically shapeddepressions 60 and 1I. A spherically shaped pivot point 12 may becarried by adjustable bolt 13 on one of the brackets carrying the toolsupport I2. A similar spherically shaped pivot 14 may be mounted in 15carried by the other bracket 16. The plate 15 may have four adjustingscrews located at right angles so as to adjustably posithereby make itpossible to line of the tool support pivot arrangement. In this way, theexact position of the cutting wheel I4 may be accurately adjusted.

The invention is particularly adaptable for installation on rotarydisc-type cutting tools. Variations may be made in the construction anddetails shown without departing from the spirit of the invention asdefined in the appended claims.

What is claimed:

1. Apparatus for controlling the feed of a rotary disc tool or the likeincluding a pivoted tool support oscillatable toward and away from apiece of work, a rotary disc tool mounted on said support, means todrive said tool, a hydraulic means connected with and governing thepivoting movement of said tool relative to said work, and hydraulic liowcontrol means connected with said hydraulic means normally holding saidtool support in an inoperative position and openable to allow movementof the tool support toward the work, said control means having outletstherefrom operable to change the movement of said hydraulic means andtool support from a fast to a slow rate at a predetermined point in thetravel of said tool toward the work.

2. Apparatus for controlling the feed of a rotary disc-like toolincluding a pivoted tool support oscillatable toward and away from apiece of work to be operated upon by said tool, a hydraulic cylindermeans connected to said said tool support towards the work, flow controlmeans hydraulic iiow control means.

3. Apparatus for controlling the feed of a rowhere the tool engages thework.

4. Apparatus for controlling the feed of a rotary disc-like toolincluding a pivoted tool support advanceable toward a piece of work, ahydraulic cylinder controllable by a fluid flowable therethrough, apiston movable in said cylinder for governing movement of said toolsupport, a pair of spaced fluid outlets in said cylinder, and a controlvalve for said fluid outlets, said valve normally being closed toprevent movement of the tool support said piston being movable at a fastrate of speed when said control valve is rst opened to allow fluid toflow from both of said outlets and at a slower rate of speed after saidpiston has moved in said cylinder a predetermined distance to cut offfluid flow from one of said outlets.

5. Apparatus for controlling the feed of a rotary disc-like toolincluding a pivoted tool support movable toward a piece of work, ahydraulic cylinder and piston movable therein for governing movement ofsaid support toward a piece of work located in the path of the tool, apair of spaced fluid outlets in the wall of said cylinder, and a controlvalve connected with said lluid outlets adapted to control the flow offluid therefrom, said piston being movable at a fast rate of speed underthe urgence of said tool support when said control valve is opened toallow fluid to flow from both of said outlets, and at a slower rate ofspeed after said piston has moved in said cylinder a predetermineddistance to cut off fluid flow from one of said outlets at apredetermined point of travel of the tool toward the work.

6. Apparatus for controlling the feed of a rotary disc-like toolincluding a pivoted tool support oscillatable relative to a piece ofwork, a hydraulic fluid cylinder and piston slidable therein forgoverning movement of said support, a check controlled inlet connectionat one end of said cylinder, a pair of spaced fluid outlets in saidcylinder wall, a control valve for said fluid outlets adapted to controlthe flow of uid from said outlets, said piston being movable at a fastrate of speed when said control valve is first opened to allow the llowof fluid from said outlets and at a slower rate of speed after saidpiston has moved in said cylinder a predetermined distance to cut offfluid flow from one of said outlets, and a liuid reservoir connected tosaid cylinder inlet connection and to said outlets.

'7. Apparatus for controlling the feed of a rotary disc-like toolincluding a pivoted tool support movable toward a piece of work, ahydraulic cylinder and piston slidable therein for governing movement ofsaid support, a pair of spaced fluid outlets in the wall of saidcylinder, and a control valve having an operating member mounted on saidpivoted tool support controlling the flow from said fluid outlets andnormally preventing flow therefrom, said valve allowing fluid flow totake place upon operation of said member so that the tool support willcommence movement of the tool toward the work, said piston being movableat a fast rate of speed when said control valve is rst operated and at aslower rate of speed after one of said outlets has been cut off by saidpiston.

8. Apparatus for controlling the feed of a rotary disc-like toolincluding a tool support movable toward a piece of Work, a hydrauliccylinder and piston slidable therein for governing movement of saidsupport, a pair of spaced outlets for said cylinder, uid control meansfor said outlets, said piston being movable at a fast rate of speed whensaid control means is first actuated and at a slower rate of speed aftersaid piston has moved in said cylinder a predetermined distance tocut-off uid flow from one of Cil said outlets, and means to adjust theposition of said cylinder relative to said support so as to adjust thelocation of the first of said outlets relative to said piston andthereby the point of change of speed of said piston in said cylinder.

Q. Apparatus for controlling the feed of a rotary disc-like toolincluding a tooi support movable toward a piece of work, a hydrauliccylinder and piston movable therein for governing movement of saidsupport, a pair of spaced outlets, fluid control means for said outlets,said piston being movable at a fast rate of speed when said controlmeans is first opened and at a slower rate of speed when liuid flow iscut-off from one of said outlets at a predetermined point of travel ofthe tool toward the work, and adjustable means associated with saidpiston to stop the same at a predetermined point and thereby limit themovement of said tool support relative to the work.

10. Apparatus for controlling the feed of a rotary disc-like toolincluding a frame, a pivoted tool support adjustable toward a piece ofwork on said frame, a hydraulic cylinder and piston slidable therein forgoverning movement of said support, said cylinder and piston beingconnected between said tool support and said frame, a pair of spacedoutlets, fluid control means for said outlets, said piston being movableat one rate of speed when both of said outlets are opened and at aslower rate of speed when a'rst of said outlets is rendered ineffectiveby said piston, means for adjusting the position of said cylinder onsaid frame so as to change the point at which said piston renders saidfirst outlet ineffective, and adjusting means to limit the movement ofsaid piston relative to said cylinder and thereby limit the movement ofsaid tool support relative to the work.

11. Apparatus for controlling the feed of a rotary disc-like toolincluding a frame, a pivoted tool support having an adjustable pivot andoscillatable relative to a piece of work on said frame a hydrauliccylinder and piston slidable therein for governing movement of saidsupport, said cylinder and piston being connected between said toolsupport and said frame, a pair of spaced outlets, uid control means forsaid outlets, said piston being movable at one rate of speed when bothof said outlets are opened and at a slower rate of speed when a rst ofsaid outlets is rendered ineffective by said piston, means for adjustingthe position of said cylinder on said frame so as to change the point atwhich said piston renders said rst outlet ineffective, and adjustingmeans to limit the movement of said piston relative to said cylinder andthereby limit the movement of said tool support relative to the work.

CHARLES F. SI-IEELEY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Certificate of Correction Patent No. 2,467,161.April 12, 1949.

CHARLES F. SHEELEY It is hereby certified that error appears in theprinted specication of the above numbered patent requiring correction asfollows:

Column 3, line 34, for the Word "bow read jlo'w;

and that the said Letters Patent should be read with this correctiontherein that the same may conform to the record of the case in thePatent Oce.

Signed and sealed this 27th day of September, A. D. 1949.

THOMAS F. MURPHY,

Assistant Uommzssz'oner of Patents.

